Home / 3,873.78-5,345.74-2,105.40

Finding the Fourth Proportional to 3,873.78, 5,345.74 and 2,105.40

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Solution

The fourth proportional to 3,873.78, 5,345.74 and 2,105.40 is: 2,905.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.78 : 5,345.74 = 2,105.40 : x
  2. Step 2: Convert to fraction form
    3,873.78/5,345.74 = 2,105.40/x
  3. Step 3: Cross multiply
    3,873.78x = 5,345.74 × 2,105.40
  4. Step 4: Simplify right side
    3,873.78x = 11,254,921.00
  5. Step 5: Solve for x
    x = 11,254,921.00/3,873.78
  6. Step 6: Final answer
    x = 2,905.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.